How python calculates the factorial of any number in a row

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Calculates the factorial of any number in a row. Python 2.x.result = (lambda k: reduce (int.__mul__, range (1) (1) (3) print (result) #-> 6Python 3.x.import functoolsresult = (lambda k: functools.reduce (int.__mul__, range (1) (3) print (result)

#-> 6

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